The preparation, and applications of g-C3N4/TiO2 heterojunction catalysts—a review

In recent years, more and more attention has been paid in the research of heterojunction catalysts, due to their better catalytic ability than that of single component catalysts. Up to now, many kinds of heterojunction catalysts have been reported, such as Bi2O3/Bi2WO6, WO3/BiVO4, SnO2/TiO2, CdS/TiO2, Ta3N5/Pt/IrO2 and so on, among which the heterojunction catalyst composed of g-C3N4 and TiO2 has been studied tremendously recently, due to the high activity, high thermal and chemical stability, and well matched energy structure of them. Up to now, many methods have been explored for the synthesis of g-C3N4/TiO2 heterojunction catalysts, such as ball milling of g-C3N4 and TiO2, hydrothermal growth of TiO2 on g-C3N4 and so on. In this review, the recent researches on the synthesis of g-C3N4/TiO2 catalysts were summarized. Moreover, the applications of g-C3N4/TiO2 catalysts in the field of photocatalysis were detailedly introduced.